Timestamp in vBulletin header

[dveaner51]

I need to pass a timestamp as a variable to a URL in an iFrame. In PHP it would be this:

PHP Code:

$tm = time();
echo "<iframe src=\"http://www.SiteIamFraming.com/gim/?a=$tm\" frameBorder=\"0\" width=\"350\" height=\"180\" scrolling=\"no\" id=\"iframeID\" style=\"display:block;\"> </iframe>"; 


How can I do this in the header file of a vBulletin template?

Thanks